Method for producing masterboard alignment film and transfer printing plate and alignment solution

Abstract

Embodiments of the present invention disclose a method for producing a masterboard alignment film, and a transfer printing plate and an alignment solution. The method comprises coating the alignment solution on a masterboard having two or more substrates using the transfer printing plate which has a transfer region simultaneously covering the two or more substrates, so that the alignment solution forms an alignment film on the masterboard; and removing the alignment film on the masterboard which is located in regions that are out of the display regions of the substrates and where there is no need to retain the alignment film. This method can solve the existing display defect issues that are caused by too thick peripheral regions of the alignment film, and the overlapping of the too thick peripheral regions of the alignment film with the sealant region.

The invention claimed is: 
     
       1. A method for producing a masterboard alignment film comprising:
 coating an alignment solution on a masterboard having two or more substrates using a transfer printing plate which has a transfer region simultaneously covering the two or more substrates, so that the alignment solution forms an alignment film on the masterboard; and 
 removing the alignment film on the masterboard which is located in regions that are out of display regions of the substrates and where there is no need to retain the alignment film; 
 wherein the alignment film is formed of a light processing material comprising a liquid crystal molecule alignment material, a photosensitive material, a photosensitizer and a solvent; and an exposure process is conducted on the alignment film itself using a mask plate with a duration of exposure being between 60 seconds and 100 seconds so as to make a predetermined region of the alignment film exposed, and then a developing process is conducted on the alignment film itself for removing the alignment film in regions that are out of display regions of the substrates and where there is no need to retain the alignment film; 
 wherein the transfer printing plate is provided around an outer surface of a roll, and the transfer printing plate comprises a basal membrane and a transfer layer that is smaller than the basal membrane and disposed on the basal membrane, and in operation the transfer layer simultaneously contacts the two or more substrates of the masterboard to simultaneously transfer the alignment solution onto the two or more substrates of the masterboard. 
 
     
     
       2. The method according to  claim 1 , wherein said liquid crystal molecule alignment material is either or both of main chain polyimide and side chain polyimide. 
     
     
       3. The method according to  claim 1 , wherein said photosensitive material is 2,3,4,4′-tetrahydroxybenzophenone 1,2-diazidonaphthoquinone-5-sulfonate. 
     
     
       4. The method according to  claim 1 , wherein said photosensitizer is diazonaphthalenone sulfonyl chloride. 
     
     
       5. The method according to  claim 1 , wherein when said alignment film is removed using the exposure and developing process, an wavelength of an ultraviolet ray emitted from an exposure device is 340˜460 nm. 
     
     
       6. The method according to  claim 1 , wherein said liquid crystal molecule alignment material accounts for 25˜35% by weight of the alignment solution, said photosensitive material accounts for 3.5˜6% by weight of the alignment solution, and said photosensitizer accounts for 0.8˜2.5% by weight of the alignment solution.